Seiko Cal. 6657 - 511

The Seiko 6657-511 represents an important milestone in Seiko's 1981 lineup. It features a Cream dial protected by a Acrylic crystal and offers 200m of water resistance. [seikata-wm-9813c65931f5]

Also known as: Helmet

Specifications

Movement

Kinetic

Case Material

Stainless Steel

Case Width

43mm

Case Thickness

15.0mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

200m

Dial Color

Cream

Jewels

17j

Frequency

28,800 bph

Power Reserve

47 hours

Year

1981

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